Declension table of ?kāṣṭhāguru

Masculine	Singular	Dual	Plural
Nominative	kāṣṭhāguruḥ	kāṣṭhāgurū	kāṣṭhāguravaḥ
Vocative	kāṣṭhāguro	kāṣṭhāgurū	kāṣṭhāguravaḥ
Accusative	kāṣṭhāgurum	kāṣṭhāgurū	kāṣṭhāgurūn
Instrumental	kāṣṭhāguruṇā	kāṣṭhāgurubhyām	kāṣṭhāgurubhiḥ
Dative	kāṣṭhāgurave	kāṣṭhāgurubhyām	kāṣṭhāgurubhyaḥ
Ablative	kāṣṭhāguroḥ	kāṣṭhāgurubhyām	kāṣṭhāgurubhyaḥ
Genitive	kāṣṭhāguroḥ	kāṣṭhāgurvoḥ	kāṣṭhāgurūṇām
Locative	kāṣṭhāgurau	kāṣṭhāgurvoḥ	kāṣṭhāguruṣu

Compound kāṣṭhāguru -

Adverb -kāṣṭhāguru